Group A of the EuroBasket 2011 took place between 31 August and 5 September 2011. The group played all of its games at Cido Arena in Panevėžys, Lithuania.
The group was composed of Poland, Great Britain, Turkey, host Lithuania, defending champions Spain and Portugal, who qualified from additional qualifying round. The three best ranked teams advanced to the second round.
| width=160 | Team | width=20 | Pld | width=20 | W | width=20 | L | width=35 | PF | width=35 | PA | width=35 | GA | width=30 | Pts. | width=25 | Tie |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5 | 4 | 1 | 404 | 364 | 1.109 | 9 | 1–0 | ||||||||||
| 5 | 4 | 1 | 429 | 374 | 1.147 | 9 | 0–1 | ||||||||||
| 5 | 3 | 2 | 385 | 333 | 1.156 | 8 | |||||||||||
| 5 | 2 | 3 | 372 | 410 | 0.907 | 7 | 1–0 | ||||||||||
| 5 | 2 | 3 | 401 | 424 | 0.945 | 7 | 0–1 | ||||||||||
| 5 | 0 | 5 | 344 | 430 | 0.800 | 5 |
All times are local (UTC+3)